111123233121 has 8 divisors (see below), whose sum is σ = 148166951104. Its totient is φ = 74080835280.

The previous prime is 111123233099. The next prime is 111123233147. The reversal of 111123233121 is 121332321111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111123233121 - 2⁶ = 111123233057 is a prime.

It is a super-2 number, since 2×111123233121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111123633121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113290 + ... + 484851.

It is an arithmetic number, because the mean of its divisors is an integer number (18520868888).

Almost surely, 2^111123233121 is an apocalyptic number.

It is an amenable number.

111123233121 is a deficient number, since it is larger than the sum of its proper divisors (37043717983).

111123233121 is an equidigital number, since it uses as much as digits as its factorization.

111123233121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660071.

The product of its digits is 216, while the sum is 21.

Adding to 111123233121 its reverse (121332321111), we get a palindrome (232455554232).

The spelling of 111123233121 in words is "one hundred eleven billion, one hundred twenty-three million, two hundred thirty-three thousand, one hundred twenty-one".